Method of operating and a controlling means for carbureters



D. L. WINTERS.

METHOD OF OPERATING AND A CONTROLLING MEANS FOR CARBURETERS.

APPLICATION FILED OCT. 15, 1919.

Patented July 12, 1921.

gwucmm an?! L. Winters UNWED STATES. PATENT UFMQE.

DAVID L. WINTERS, F EDGEWATER, MARYLAND,

METHOD OF OPERATING AND A CON TBOLLIN G1- MEANS FOR CARBURETERS.

Application filed October 15, 1919.

To all whom it may concern:

Be it known that 1, DAVID L. WINTERS, a citizen of the United States, residing at Edgewater, in thecounty of Anne Arundel and State of Maryland, have invented certain new. and useful Improvements in Methods of ()perating and a Controlling Means lit) for Carburetors, of which the following is a specification.

This invention relates to a method of operating and a controlling means for carbureters and more particularly to that class and the operation of such devices adapted to utilize the partial vacuum which ex sts in the intake manifold between the engine and the throttle valve in order to provide the engine with the proper mixture at all times.

The primary object of this invention is to construct a means of the character set forth which will operate to feed to the enginealean heat expanded charge whenidllng and operating under greatly throttled conditions,

j as describedin the tion, and in which for operation under full load to a suitable mixture combined with hot and cold air under moderate load stresses, and provide a supply of comparatively cold air at the same time adding fuel in proportion to the increase in oxygen between the hot and cold charge and further adding fuel to the cold charge to give it maximum efliciency.

With the foregoing and other objects in view as will from time to time hereinafter appear, this invention consists in the combination and operation of the various elements of a controlling means for carbureters following specification and more particularly pointed out in the annexed claims.

Referring to the accompanying drawings illustrating an embodiment of the inven the same reference characters indicate the same parts wherever used,

Figure 1 is a side elevation partly in section and partly broken illustration.

Fig. 2 is a detail showing a modification and Fig. 3 is a view further illustrating the modified form.

4 designates a carbureter asa whole, comprising float chamber 5, intake 6 and inter-. mediate well 7, having a needle valve 8 operated by suitable mechanism 9 connected Specification of Letters Patent.

away for sake of.

in Fi 2. In ig. 1 of serial No. 3305799.

tem illustrated in my Patent 1,286,474, December 3, 1918.

casing 12 is secured to the exterior of the intake 6 and communicates therewith through the medium of a port 13, the casing 12 being open ended at 14 and housing a 0011 spring 15 confined therein by a piston 16, Which is slidable in said casing and carr es by means of eyes 17 and 18 a rod 19 connected to a lever 20 fixedon a shaft 21 ournaled inthe walls of the hot air inlet 2 in communication with any suitable air heating means (not shown) and carrying a butterfly valve 23 rotatable therewit A slmilar butterfly valve 24 is located in the cold air inlet 25 and is supported by a shaft 26 journaled in the inlet walls, said shaft carrying a link member 27 connected stops 39.

A bypass 40 in conjunction with the port 41 afiords additional communication between the well 7 and the intake 6.

In the modification shown in Figs. 2 and 3 the rod 19 is attached to a lever 42 to operatively connect the butterfly valve 23 and the piston 16,-b1it the member 28 is dispensed with, and the inlet 25 interiorly provided with a block 43 secured at 44. A butterfly valve 45 is carried by a shaft 46 and so disposed as to normall abut against the block 43 to form therewith a closure for the inlet 25, said valve 45 being cut away opposite the block 43.

The shaft 46 projects on either side of the inlet 25 and is provided with a pairof coil springs 47-48 *about the projections and secured thereto and to the wall of the inlet 25 at 49-50 in such a manner as to normally hold the valve 45 in closed position as shown Patented July 1%, i921;

the drawing the' parts are shown in a position of rest. The position of the valves will be changed upon the throttling of the motor..

The operation of the mechanism just described is asfollows:

The strength of the vacuum existing 111 the intake 6 is varied by the load on the motor, and is proportionately affected by such load, so that this vacuum may be properly used as an actuating medium for mechanism controlling the temperature and density of the mixture necessary for the engine, an indication of such varying necessity being the variance of the vacuum.

This vacuum exerting a pull upon the piston 16 causes the same to move in the casing 12 against the action of the spring 15 and operates the rod 19 to open the butterfly valve 23 controlling the hot air intake 22 and through the connection 28 operating to close valve 2i regulating the intake of cold air and at the same-time completely closing the needle, valve 31, through the connection 29, the degree of such operations being governed by the strength of the ull. p Upon a partial cessation of this pull due to a reduction of the vacuum, the piston 16 will be moved downwardly in the casing 12 by the spring 15 carrying the rod 19 now operating to move the valve 23 to a closed position and the valve 24 toward an open position at the same time opening the needle valve 31 to permit of the feeding of an additional amount of fuel to, the well 7 to compensate for the'feeding of cold air by the opening of valve 24: to provide the proper mixture. 7 j

In the modification the mechanism controlling the hot air intake functions as above described, the valve 45 however opening upon suction therethrough due to the different wing area of said valve, which action is governed by the springs 47-48 which are so tensioned as to give this action, such opening being controlled by the speed of the engine causing the suction.

By the imodification the control of the amounts of hot and cold air and fuel is automatic, but independent, and the mixture is enriched by the presence of the vacuum in the cold air intake 25 on the closing of the valve 23 and due to the opening of the valve *45 under suction which forms such vacuum in the intake 25. That such vacuum does exist in the intake 6 and will operate as above described has been determined'by applicant by several experiments in which a vacuum gage was attached to the dash of ghpdcar and connected to the intake mani- During these tests when idling the engine presented avacuum which the gage registered as substantially eight pounds, in comparison with' substantially no vacuum under full load conditions. When running approximately fifteen miles per hour under ideal road conditions a vacuum of substantially four pounds was shown by the gage.

When this speed was reduced fifty per cent. by afurther throttling of the charge, thus reducing the load upon the motor fifty per cent., the gage registered substantially six pounds, or an increase of fifty per cent.

On the other hand when this speed was reduced fifty per cent. by an increase of load, or when substantially twice the volume of charge was required to maintain this speed the gage registered two pounds, a

decrease in vacuum to correspond with the increase in load.

It will thus be seen that this partial vacuum may be utilized to operate the necessary mechanism as herein described, such vacuum accurately indicating the volume of charge necessary to be furnished to the motor when operating under load as compared with the volume of the charge required for idling only. While the advisability of preheating small and medium charges is generally recognized, it is well known that the preheating of a full or nearly full charge is often accompanied by pre-ignition, and always by a loss in power equal to the difference in oxygen content between the preheated and therefore preexpanded charge, and the cooler and therefore denser charge that should be used under full or nearly full load conditions.

The mechanism above described fully provides for the above conditions.

Considerable variation of the details as described herein may be resorted to without departure from the spirit of the invention which is to be construed in the light of the following claims.

Having thus described my invention what I claim as new and desire to secure by Let-.

ters Patent is:

1. In a carbureter, in combination, an intake for the engine, a hot air intake, a cold air intake,'a fuel valve, means operated by the vacuum existing in said engine intake to control the admission of hot and coldair and said fuel valve.

2. In a carbureter, in combination, an in- 4. In a carbureter, in combination, an air In testimony whereof I aflix my signature intake, a fuelv intake, an engine lntake, 1n the presence of two wltnesses.

means to heat the charge, and means oper- DAVID L WINTERS ated by the vacuum existing in the engine 5 intake for controlling both the temperature Witnesses:

of the charge and the richness of the K. E. KLEIN, charge. ERNEST O. CROGKER. 

